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  1. Subwoofer Amps | High Pass Filters
    Hi All, I have just built a ported sub woofer & can't seem to get any frequency below 30 hz. The sub woofer driver is a Mach audio IXL 18. The cabinet was designed with the help of gperkins_1973 & is tuned to 15hz. There is a build thread (I tried to insert the link but became to long) The...
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